Table 4

 Odds ratios (95% CI) for prevalence of allergy by birth order and childhood socioeconomic position

Childhood socioeconomic positionBirth order
123+
Test for interaction between birth order and childhood socioeconomic position, p = 0.035.
I11.00 (0.79 to 1.28)1.01 (0.74 to 1.37)
II10.91 (0.75 to 1.11)0.58 (0.44 to 0.75)
III10.84 (0.68 to 1.04)0.84 (0.66 to 1.07)
IV–V10.80 (0.48 to 1.33)0.36 (0.18 to 0.71)